A novel protocol under a priority time constraint for
real-time communication systems is proposed. This protocol
can maintain two priority classes. The characteristics of the
proposed protocol and its features are presented, and a
simulator is built to examine its performance. The performance
of the protocol is compared with that of the virtual-time
carrier sense multiple-access (VT-CSMA) protocol. The results
show that, although the proposed protocol has less throughput
than the VT-CSMA protocol, its behavior is better than that
of VT-CSMA with respect to high-priority packets. This
behavior is the main goal of the protocol, which reduces
high-priority-packet loss